Lorellaro, I've played it on my basilisk open-source browser (being similar to firefox) on a windows8.1-laptop, just in case you'd be curious of stats like if tested on a mobile-phone/touchscreen or tablet, etc. or even if some browsers do offer different appearances there?
greyish background, purple font for its itch-description: sounds okay. maybe adding a background behind the game sounds even more cool?
title: sounds curious, same for it's bannerpic/preview.
main-screen: credits sound bit hard to read in its font.
quit-button at main-screen: gets just a greyscreen on itch, which is within the game. restart could be done by refreshing the browser's tab (but fakes +1 to the stat's of played amounts per day).
play-button works.
in-game: same issue with the font. While I like the scroll and top-nav's font-family, just the how-to-play looks hard to read (too narrowed letters). Battery-icon for health sounds cool, an available score looks interesting so far. Music fitting to the game, like if it's about gladiators or similar themed about battles or shield/spear accessoires, just what I'm expecting when listening to this music in combination of the title and font there.
uhm, I will loose battery and lives, top-bar visible and top-left one updating but black screen and no enemies or player there. Clicking will increase right-top stats still is it supposed to fight in the dark?
ending-scene: score, home, "game", quit.
possibly the order could be like "game" referring to its title and being at the top? Or in addition of your nick to notice who designed this game, could be useful as info too.